Process of manufacturing vacuum wall-containers



Y C, A.Y ROHLANU. PROCESS OF IVIANUFACTUNG VACUUM WALLv CONTAINERS.APPLCATIOFlLED MAR. 2Q |920.,

1,388,126.- muted Aug-$16, 1921.

3 SHEETS-SHEET 2.

IN VENTO/e C. A.v RUHLAND. PROCESS of MANUFACTURING VACUUM WALLCONTAINERS.

APPLICATION FILED MAR` 20. 1920.

1,388,126, Patented Augl 16,1921.

3 SHEETS-SHEET 3J UNITED sTATEs- PATENT OFFICE.

lCHARLES A. ROHLAND, oF uNIoNToWN, PENNSYLVANIA, lAssreNoii, BYIDIREGTND :MEsNE ASSIGNMENTS, ro vAcUUM eLAss MACHINE ooMPANY, or"UNroNrowN, lrENNsYLvANIA, A oomfonArIoN or DELAWARE. y

:eno-criss or MANUFACTURINQVACNUM WALL- coN'rAiNmts To allwhom t mayconcern: l

Be it known that.I, CHARLEs A. ROHLAND',

a citizen of the United States, and a resident of Uniontown, in thecounty of Fayette and State ofPennsylvania, have invented certain newand useful Improvements'in Processes of Manufacturing VacuumWall-Containers, of which the following is aspecifiany size, capacity,sha e or design, and it has for its object to re uce the' steps of op#cation.

This invention relates to a new process of manufacturing v acuum wallcontainers of eration and labor in manufacturing said containers at aminimum cost and ingreat-quantities. A further object is to enable oneto produce vacuum Walled y containers when made of glass to eliminatethe use of quicksilver lining, so that the same will be trans.

parent and enable any foreign matter in the container to 'be detached,and especially adapt the lsame for use as a cheap and highly efficientcarrier for milk, cream or other liquid and'perishable food products.

Other objects and advantages of the process will be manifest and fullyunderstood from the detailed description of the Steps of the processdescribed in. connection with an lapparatusv for carrying out the sameto be hereinafter more fully disclosed.

The invention consists of steps, or a series 'of steps, in acertainvsequence upon certain materials, suchias molten glass or othermaterial having similar characteristics to be hereinafter 4more fullydescribed and particularly pointedout-in the appended'claims.

In the three sheets of drawings, -similar reference characters indicatethe same partshead removed;

Fig. 4, is a cross-section of the lfinishing mold for the inner sectionof the container; n Fig. 5, is across section of the mold lSpecification of Letters Patent.

, Application filed Maren 2o, 1920. -serial No.

ratenteiiv Aug. ie; 1921;

finished vacuum wall container made according to the process.

In the drawing, the machine shown is illustrated as an attachment to theusual4 form of glass blowing machines of standard make, .and the changesmade are readilyV adaptable to said machines bymerely'varyland plungerfor eastiii and i* ressin the' Y blank for the inner sectin of thlI ging the mold and plunger equipments'and modifying the motive power orcompressed l' air connections for properly functioning the n ovel vacuum'producing and sealing operations carried out during the,` 'improvedprocess.

,' Referring to Fig. 'l lofithe drawings, 10'

is the'blank table and 11 is the blowing up table, said tables 10 and11v 4being interengaged by pinion 12 meshing with teethon vthe peripheryof said' tables 10`and 11, so

that said tables will rotate in fixed relation and in oppositedirection, as indicated by arrows. Table l() is provided with two setsof blank molds, one set 13 being the'smaller, as shown in Fig. 5, andforming the inner section I of the container (see Fig. 7) and the larger'molds 14 (as shown in Fig. 6) for forming the outer shell O of thecontainer, said molds 13 and 14 alternating around the table 10, asindicated.

Table l1 has secured to it and disposed as shown a series ofblow molds15, l5, as shown in Fig.. 4,' for finishing the inner sections of thecontainer formed by the molds 13 on table 10. 16, 16, are a series ofblow molds, as shown in Fig. 3 for finishing the outer shells formed by.the molds 14, 14,

on tablelO, said blow molds 15 and 16 are alternately arranged as shownand so disposed that by the 'fixed relation and opposite rotation ofthetables 10 and 1 1the blank` molds 13 and blow molds 15 are opposite atthe nearest point of approach to each other, and by the oppositerotation of the said tables 10 and 11 the same relation between l themolds 14 and 16 will follow, and while I may provide eight molds on eachof the tables 10 and 11, this number may be deof the -usual and standardformj-oi'f glass- `which rod issecuredtgoa disk 26, adapted tobe seatedin the open end'of'the inner secblowing machine are provided ,th-reevcylinders 18, 19 and 20, the two last mentioned cylinders -1\9fa`nd20,- being preferably vnearest to the column 1-7 and arranged in linewith each other and are'provided with pistons 21 and 22, which areconnected together by a piston rod 23, as clearly shown in Fig.- 3.

.Cylinder 18 is .provided with'a piston 24,

having a piston rod 25, the lower end of tion I, of the container, 4assliown in Fig." 3. I

f Ajshort distance above the said 'disk 26 is fastened asupport 2 7 "towhich -is suitably pivot'ed ingers"28,.28, so constructed and ar .rangedto griptheouter and upper edge or ring of. the inner vs ectionl, saidlingers 28, 28, being normally forced; toward the disk .26 bysuitablesprings 29, 29,- as indicated.

3() is a suctionhead surrounding the lower end of the Ypiston rod 25vand 1vs provided with a stutling boX 31- at its upp'er end f throughwhich s aidrod 25 passes. Onl said 30 inthe upwardmovement oftheendofabuffer spring interposed between. the pis?- vrod 25 are-adjustable stops32, and .33, lto limit the'upper and` lower movement'o rpo-f'-` sitionof the suction head30 on said `rod25 and said stop 33 is adapted to lifts aid head plained. The lowe'rf-edge 34 of. the-suction head 30k is soformed and constructed as'toj tightly fit andengage the tapered'top ofaVclosed blow mold 16.- when properly placed of the cylinder-1 9 with thesame source o'j power'and'pipes-40 and v41 for the purpose offreciprocating-thepiston 21 and operating thej-suctionpiston'22 .towithdraw or eX- from -within'gthesuctionhead '30, as will bev readilyseen.,l 'I heY upperhead 'ot 'the suction cylinder 2O :is suppliedwithan outwardly opening relief or. exhaust" valve v44,'. for `thepurpose of permitting the -escape 'of .the air o nthe upwardstroke of4piston22. The usual form of blow head low central' column 17, and-hasthe `interior'o f "its iipper and lower ends (see Fig.

2) connected'by means of flexible pipes 46 'and '47 -with the compressedair supplyl pipes .40 and 41, as indicated. The connection of pipes-38,39, 42, 43, 46" and '47 with the pres sure supply pipes 40 and 41 arecontrolled respectively, by any suitable formof com- Abined control andrelief valves 48, 49, 50,51, 52 and 53, as indicated in Fig, 2,-saidvalves automatic meanscommon in this class of invention and formingnopart of the physical steps ofthe preslltfprocess.

. The preferred manneriof' carrying out the 4needs no further showingand disclosure. rod-25, for purposes' tobe "hereinafter ex- Asthepressed hot blanks formed in said being controlled by'any suitablemanual 1or l molds ,13 yand214 reachthe point opposite totheinterengaging pinion 12,v said hot blanks are transferred tothe blow.molds 15 and 16, the hot blanks of molds13 going into blow or rotated inposition with respect tothe ymolds 15, and hot blanks of molds14 beingaxis of the rod 25. 35 is al valve.controlling` an air inletpassage-leading into the suction head 30 for the purpose ofdestroying'the va-cuum'within said head afterja container I has beeninished within.. the mold516.' 3 6 is,

ton 24 and lower head of the cylinder 18 vfor retarding the downwardInoi'fementl o'lsaidpiston 24,-a's will belreadilyunderstood. A 'pair offlexible tubes 36 connects the inL teriorof the upper end of the suctioncylinder 20 with the interior-of the suction head 30 through checkvalves 37. 38 and 3 9 are iiuid pressure supply pipes connectingrespec-tively the upper and lower' ends i-'cylin-y der 18 for thepurpose of reciproca-ting. its

deposited int'ofblow-melds"1Q-which operation-is continuousand withoutappreciable loss oheat in the transferring-ofthe blanks A,from theirrespectivemolds 13 and 14 to' blow :molds 15fand 16. -As'the blow molds.are carried by-the rotation'of the table 11` to the point directlyinposition to be blown bythe blow head45, said blow head. is thenlowered in proper positionand the contained blank is, blown up.This'operation is repeatedas cach of the. blow molds 15 and- 16 reachthe blowing position under the blow head 45. The preferredmannerofi'carrying out the process is to rst blow oneof the blow molds 15 toform an inner s eetion I. The-blow'head 4 5` is then-elevated and theblow mold' 15 with its inner section Icompleted thereinis advanced tothe point directly u-ndcr the suction head 3 0, and'the upper hingedsection of the. blow mold 15 is then opened while being advanced toposition under suction'head 30. Said head 30 and rod 25 withv its'attached spring fingers 28,. and disk 26 are depressed-so that thelower edge 34 of head 30 rests on the upper iio4 open hinged section ofthe blow mold 15. A

further depression of thel end of rod 25 I, within the mold 15. Thesuction head 30 and the rod 25, disk 26 with the fingers 28 carrying theengaged inner section` I is then elevated.' During this forging opera--tion the following blow mold 16 has been blown under 'the blow head 45and is advanced with the blown outer shell O in position under suctionhead 30. Whennas'sured that said blow mold 16 is properly adjusted, thesuction head 3Qv with rod 25, disk 26and kfingers 28 carrying theattached inner secvtion I is Vlowered to such an extent that the loweredge 34 of the suction head is firmly seated and with a sealing contactrests on the body portion of the inner section I will project into.theouter shell O and without touching the said shell Of As soon as theedge`34 ofjsuction head 30 has been sealed against mold 16, the suctionpump 20 is operated as will be-readily understood, and said exhaustingoperation by pump 20 `is j continued until a'near approach to a vacuum.has been attained within the head and 30 space between the walls of theinner section I and outer shell'O, when the piston 24 with its rod 25 is.further depressed until the j under side'of the upper ring portion ofthe.

inner section and the4 top portion of the mouth ofthe outer 'shell arein, contact and in position, as shown in finished container illustratedin Fig. 7. Tliejglass being hot and'in a sticky condition the jointbetween said inner section-Land outer shell O will 40 be hermeticallysealedfand the vacum`between said section I andshell O be permanentlypreserved when the completed container-isremoved from the mold -16.After the sealing operation just described is-completed, thejvalve 3 5is opened and air permitted to e'nter within the head v30, therebyneutralizing the outside or atmospheric pressure. `Thepiston 24, rod 25,disk 26,-

'inger-s 28, and head 30 are then elevated,l said fingers 28 and disk 26being easily,re -leased from the inner section I'and finished container.Said mold 16 withfinished container B therein (see Fig. 2)V is thenadvanced to the position indicated, when the" mold 16 is opened and thefinishedl container is 'removed from said mold 16, and set upon acooling stand to cool, as is the usual practice in manufacturing glasshollow ware, and later to be subjected to annealing or other treatment,if so desired. The foregoing operations 'as will be seen by lthearrangement of apparatus can be made continuously and withoutinterruption and'- any unnecessary movements.

It will also be seen that by thexpractice or the toptapered'portion ofthe mold 16 andsteps used in carrying out my process, a

vacuum wall container is produced without reheatingany part or sectionof the elements forming-said container, thereby insuring a uniformproduct at a minimum of cost, and

no appreciable lossesdue to the breakageowing to repeated handling, andunequal expansion and contraction of the glass. It will also. be readilyunderstood that many type's of horizontal, as well as vertical types ofmachinery, can be utilized -for carrying out the novel steps of thehereindescribed process whether the inner section or the outer shell isblown first.

wWhat I claim is 1. The process of manufacturing vacuum wall containerswhich consists in, first, forming a hot inner section having a closedbottom and open top end and a hot'outer shell having a closed bottom anda top provided with an opening larger in diameter than the greatestwidth of the body portion of the inner section, second, inserting thebody portion of the hot inner section Awithin the hot outer shell,third., exhausting the air between 90 the walls of the outer shell andthe body por- "tion of the inner'section, fourth, uniting the hot innerportion of the opening of the outer shell and the hot outer portion ofthe top .end of the inner section while said inner and outer portionsare in condition to stick `and adhere to eachother `and hermeticallyseal- 4the space formed between said outer shell Vportion of thesections forming the con tainer. i

2.y The process of manufacturing vacuum wall containers which consistsin, first, forming a hot innerV section having a closed bottom and anopen top end, second, forming a hot outer shell having a closed bottomand a top provided with an opening larger in diameter thanthe greatestwidth of the body portion of theinner section, third,inserting 110 thebody portion of the Ahot inner section within the hot outer shell,fourth, exhaustingthe air between the Awalls of the outer shell and thebody portion of the inner section, fifth, uniting the hot inner portionof the `open top of the outer shell and the hot outer portion of the'open top end of the in'- ner section while said inner and outerportions are in condition to stick and adhere to each other andhermetically seal the space formed between said outer shell and innersection, whereby a vacuum wall container is produced without reheatingany portion of the sections forming the container.

3. The process of manufacturing vacuum wall containers which`consistsin, first, forming a hot inner section having a closed bottomand an open top end, second, forming a hot outer shell having closedbottom and a top provided with an openingr larger in diameter than thegreatest Width .of -.the

fourth, exhausting` the air between the ."Wall of the outer shell andthe body portion of theinnr section, fifth, forcing together .the hotinner portion of the open top of the -outer shell and the hot outerportion ofthe open top end of `the inner section While said inner andouter portions are in condition t0 stick and adhere to each otherandhermetically seal the 'space formed between said outer shell andinner section,` whereby a vacuum Well container is produced Withoutreheating-any portion of the sections form- -ing the container.

4. The process of manufacturing vacuum Wall containers Which consistsin, first, forming an inner section having a closed bottom and a hotopen top'endA and in outer shell having a. closed bottom and a hot topprovided With .anopeni'ng larger lin diameterv than the greatest Widthofthe body portion of the innerfsection, second, inserting the bodyportion of the inner section Within the outer shell, third, exhaustingthe air between the Walls of the outer shell andthe body ,porf tion ofthe inner section, fourth, uniting thehot inner portion of the openingof. the outer shell and the hot outer portion of the top' end of theinner Section While said innerl and outer portions are'ln condition tostick 4and adhere to each other and hermetically seal the space formedbetween said outer shell and innner section.

In testimony whereof I aixmy signature. i

CHARLES YA; RO'HLAND.

